Adds dynamic winter - summer cycles with a moving cold snow front that gradually freezes and thaws the map. Turns natural bodies of water into ice and back. And a Christmas tree as a bonus :)
That makes sense. I'm not sure about freezing all entities - it might be too harsh, especially in the early game.
I'm also thinking about temporary freezing right after a very cold snow front. But I need to do some research to figure out whether this approach is feasible